I'm looking online for battery charging bags to try to be as safe as possible when charging Li-ion batteries. Right now, I make sure all of my chargers are visible when in use so I can continually check them and take the batteries off as soon as they turn green. Question is, in a bag, how do you do that without constantly opening the bag to see if it's done? Is there a vendor out there who makes a clear or see-through bag?? If not, someone should if it's possible.